Type-writing machine.



E. B. HESS.

TYPE WRITING MACHINE. APPLICATION FILED MAY 4, 1912.

1,138,106. Patented May 4,1915.

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invirrnn sitar EDWARD B. HESS, OF NEW YORK; N. Y., ASSIGNOB, BY MESNE ASSIGNMENTS, TO ROYAL TYPEWRITER COMIPANY, INC.,'-OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented May 4, 1915.

Application filed May 4:, 1912. Serial N01 695,027.

To all whom it may concern:

Be it known that I, EDWARD B. Hess, a citizen of the United States of America, residing in the borough of Brooklyn, city of New York, county of Kings, and State of New York, have invented a certain new and useful Improvement in Type-Writing Ma chines, of which the following is a specification.

This invention is shown applied to a Royal Standard typewritihgmachine and constitutes an improvement on the dust sheds or dust guards thereof;

In the accompanying drawing Figure l is a detail plan: Fig. 2, an end view showing, however, the carriage ball race in transverse section: and Fig. 3, ,a rear view of one of the dust guard sections.

The invention is shown applied to dust sheds of the general character disclosed in the patent to Hess and Stoughton, No. 888438, dated May 19, 1908.

The dust guards 1,1, are arranged to the left and right of the printing point and between their adjacent edges, suitably adja cent the platen, is located the ordinary type bar guide 2 in rear of which there is to be the usual ribbon vibrator. These dust guards are each formed with a circular recess 3 in the front edge for the accommodation of the ribbon spools and on the side of such recess the edge, of the dust guard extends rearwardly to the type bar guide in a curve that permits the end type bars to move from normal position to the printing point. The curved portion of the dust guard is turned upwardly, as at 4, forming a sort of upwardly rising wing that drops down in the plane of the rear face of the type bar guide to'the level of the body or flat face of the dust shed. In the shoulder 5 so formed there is a depression 6 for the accommodation of the ribbon that passes from the spool rearwardly to the ribbon vibrator, the latter not being shown. Such dust sheds have been satisfactorily used in the Royal Standard machines.

The present invention comprises a modification of construction in which there is provided an upright flange 7 extending along the rear edge of the dust guard and then forward as at 7 to the shoulder 5. In the space between the two upright portions 7 on the respective dust sheds the ribbon vibrator will be located. Ordinarily the dust flanges overlie carriage adjustment screws 8 and have heretofore been provided with apertures. In the present construe tion, however, where these carriage adjustment screws occur, the upright flange 7 is curved forwardly as at 7 so as to provide a circular recess in its rear edge to afford access to the carriage adjustment screw 8. Each dust shed may also have an upright flange extending along its front edge to the angle 9 where the dust shed commences to incline upwardly as already stated. Such a flange 10 is indicated, however, on the left hand dust shed only. It may, however, be provided on both of them.

Fig. 2 shows the relation of the ball hearing of the carriage to the rear upwardly extending flanges 7. This carriage ball hearing, indicated in a general way by 11, is such as shown in Letters Patent N 0. 958,498, granted May 17, 1910011 the application of Edward B. Hess. Ordinarily there is danger of a careless operator in brushing dirt of erasure from the dust guards 1, 1 to direct more or less of it rearwardly with the effect of discharging it into the ball race and into or upon the paper feed roll devices. lVith the present construction, such accumulations upon the dust guards will be discharged laterally. The fiange 10 on the front edge of the dust guard makes it feasible only to brush oil the dirt of erasure laterally. Heretofore, the eflort has been more particularly to protect the type bar bearings in their segment and the type bars from dirt of erasure but no provision so far as is known has been made for preventing dirt of erasure from being swept from the dust guards into the bearing of the transversely reciprocating carriage and into or upon the paper feed rolls. Experience has demonstrated that the construction herein disclosed operates to afford complete protection to such parts. As appears from Fig. 2, the front feed roll and the upper end of its reaction spring overlie the upper edge of flange 7 and the front portion of the ball race or carriage bearing are very close to a line dropped from the rear edge of the dust guards so that even with great care on the part of an operator these parts are liable unless protected to receive dirt of erasure tending to impair their perfection of operation. r

I claim:

1. In a visible writing machine, a top cover plate constituting a dust she'd composed of two sections arranged respectively on opposite sides of the printing point and having their inner edges closely adjacent and extending laterally and forwardly and each having an upright flange extending along the rear edge of each section, whereby dust and dirt of erasure is prevented from falling into the machine below the platen and is retained on the dust sheds to be laterally removed therefrom.

2. In a visible writing machine, a top cover plate constituting a dust shed composed of two sections arranged respectively on opposite sides of the printing point the inner edges of which approach each 'other toward the printing point and are formed with an upwardly inclinedpart 4 terminating in front of their rear edges forming thereby a shoulder 5 and an upright flange extending along the rear edge of each plate and, adjacent the printing point, forwardly to the shoulder 5, whereby dust and dirt of erasure is prevented from falling into the machine below the platen and is retained on subscribed my name.

the keyboard and is retained on the dust sheds'to be laterally removed therefrom.

4. In a visible writing machine, a top cover plate constituting a dust shed composed of two sections arranged respectively on opposite sides of the printing point and having their edges closely adjacent and extending laterally and forwardly and each having an upright flange extending along the rear edge and formed with a circular recess for the purpose set forth.

In testimony whereof, I have hereunto EDWARD B. HESS. Witnesses:

F. C. MYnRs,

A. J. SHERIDAN.

' Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

